diff --git a/jest.config.cjs b/jest.config.cjs
new file mode 100644
index 00000000..7268e883
--- /dev/null
+++ b/jest.config.cjs
@@ -0,0 +1,19 @@
+/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
+module.exports = {
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  transform: {
+    // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
+    // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
+    '^.+\\.m?[tj]sx?$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+  },
+  testEnvironment: 'node',
+  moduleDirectories: ['node_modules', 'src'],
+  modulePathIgnorePatterns: ["tests/testutils.test.ts"],
+};
\ No newline at end of file
diff --git a/jest.config.js b/jest.config.js
deleted file mode 100644
index f8be42bb..00000000
--- a/jest.config.js
+++ /dev/null
@@ -1,6 +0,0 @@
-/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
-module.exports = {
-  preset: 'ts-jest',
-  testEnvironment: 'node',
-  modulePathIgnorePatterns: ["tests/testutils.test.ts"],
-};
\ No newline at end of file
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
new file mode 100644
index 00000000..c1340ea2
--- /dev/null
+++ b/tsconfig.esm.json
@@ -0,0 +1,8 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "module": "esnext",     /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
+        "outDir": "build/esm",  /* Redirect output structure to the directory. */
+        "target": "esnext",     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    }
+}
\ No newline at end of file